Apparatus for collaborating statistical data



C. BOREL Sept. 27, 1938.

APPARATUS FOR GOLLABORATING STATISTICAL DATA ll Sheets-Sheet 1 Filed Dec. 3, 1923 I l H h. 0 H l l H H 1. flm m/wmw g qwmfl B m A z r Invert/fir: marceafioreq, fymdakm Sept. 27, 1938. c BOREL 2,131,497

AEPARATUS FOR COLLABORATING STATISTICAL DATA Filed Dec. 5, 1923 ll Sheets-Sheet 2 Sept. 27 1938. c BOREL 2,131,497

APPARATUS FOR COLLABORATING STATISTICAL DATA Filed Dec. 3, 1928 ll Sheets-Sheet 3 Fig.5

Sept. 27, 1938. BORE 2,131,497

APPARATUS FOR COLLABORATING STATISTICAL DATA Filed Dec. 3, 1928 ll Sheets-Sheet 4 Fig.4.

C. EOREL Sept. 27, 1938.

Filed Dec. 3, 1928 ll Sheets-Sheet 5 Sept. 27, 1938. c, BOREL, 2,131,497

APPARATUS FOR COLLABORATING STATISTICAL; DATA Filed Dec. 3, 1928 ll Sheets-Sheet 6 C. BOREL Sept. 27, 1938.

APPARATUS FOR COLLABORATING STATISTICAL DATA Filed Dec. 3, 1923 11 Sheets-Sheet 7 C. BOREL Sept. 27, 1938.

APPARATUS FOR COLLABORATING STATISTICAL DATA 1 1 Sheets-Sheet 8 Filed Dec. 3, 1928 W aw NR TN 62 K N NQNRK'SK i (if (5') fi n 1.

#5 2m in v6 Sept. 27, .1938. v c. BOREL 2,131,497

APPARATUS FOR COLLABORATING STATISTICAL DATA Filed Dec'. 5, 1928 ll Sheets-Sheet 9 WJMP 0 T0 19 .SEcaNa flccuaumme men/NHL 0P0 l a Secaw INVERTER /6 7'0 n 5550140 A a/Mum role 5/9 c. 'BOREL Sept. 27, 1938.

APPARATUS FOR COLLABORAT ING STAT I S TICAL DATA Filed Dec. 3, 1928 ll Sheets-Sheet 1O Invenfir; Cizarzerfiorev, f) ZEF W QKQ diary.

Spt. 27, 1938.

C. BOREL APPARATUS FOR COLLABORATING STATISTICAL DATA ll Sheets-Sheet 11 Filed Dec. 3, 1923 & N aux. KE

Patented Sept. 27, 1938 UNITED STATES PATENT OFFICE APPARATUS FOR COLLABORATING STATIS- TICAL DATA Charles Borel, Geneva, Switzerland '7 Claims.

The invention is directed to an apparatus for collaborating statistical data which, for instance, may be represented by means of perforations appearing on cards, recording strips or bands, or the like. This apparatus is so arranged that either actual figures or their complements may be used. It can serve as an accumulator, a transmitter of figures to another apparatus at any given moment, and, by a minor modification, as a repeater cooperating, for instance, in the execution of multiplications.

The apparatus according to the invention comprises several so-called denominational units, each of which units contains a receiving, a translating, and an accumulating device, and each of which units corresponds to a sign or number place of the indications received from the perforations.

One form of the invention, illustrated only by way of example, is shown in the attached drawings, wherein Fig. 1 shows a preferred form of the perforation combinations on a paper strip, for showing the various data values.

Fig. 2 is a cross section on the lines 2-2 of Figs. 3 and through the apparatus, the relative position of the three figures being best verified by comparing the positions of shafts AIO and All in Fig. 19. Parts lying in the rear of this sectional cut and irrelevant to the description of this figure are omitted.

Fig. 3 is a view of the lowest denominational (right hand) units of the apparatus taken on line 33 of Fig. 2, looking downward.

Fig. 4 is a view similar to Fig. 3, through the highest (left hand) denominational units of the apparatus.

Fig. 5 is a view of the lowest denominational units of the apparatus, taken from line 55 of Fig. 2, looking downward. The positions of the parts represented in this figure are best ascertained by comparing the location of shaft Bl l, which is directly above shaft BIO of Fig. 3. A number of parts have been omitted on Fig. 2 in order to avoid obstructing parts required for the explanation of the operations connected with this figure. Connections and relative positions of parts shown in Figs. 3, 4, 5 and 6 are best seen in Figs. 19 and 20. 5o

Fig. 6 is a view, similar to Fig. 5, through the highest denominational units.

Fig. 7 is a vertical section on the line |'l of Figs. 3 and 5 (mechanism for the transfer to the next higher denomination).

Fig. 8 is a cross section on the lines 8-8 of Figs. 3 and 4 (reading-off drums), additional parts being shown to locate the position of the various parts of the machine.

Fig. 9 is a view of the mechanical unit for exact adjustment of the drum shaft and Fig. 10 is a cross section on the line Ill-l0 of Figs. 3 and 4 showing the same mechanical unit.

Fig. 11 is a cross section on the lines ll--| I of Figs. 3 and 4 (carrier for the transfer to the next higher denominations).

Fig. 12 is a vertical section on lines l2-|2 of Figs. 3 and 5 through one of the cams Bbl to 31213 and levers Bdl to Bdl3. The location of the various parts shown on this figure are best seen from Fig. 19.

Fig. 13 is a cross section on the lines i3-l3 of Figs. 3 and 4 and shows part of the mechanism for entering a digit in an accumulator unit.

Fig. 14 is a cross section on the lines l4-l4 of Figs. 3 to 6 illustrating means for preparing the transfer onto the next higher denomination.

Fig. 15 is a diagrammatic view of the electric equipment of the apparatus serving as an accumulator.

Fig. 16 shows diagrammatically the electric connections in the inverter for replacing an indication value by its complement.

Fig. 17 is a diagram of the electric equipment of the apparatus when used as a repeater.

Fig. 18a shows diagrammatically the reader, and schematically illustrates the inverter and the various main shaft cams 'and circuits leading to the accumulator.

Fig. 18b shows diagrammatically the complete accumulator (except for the shutter) including the repeater elements. This figure in part adds to Fig. 15 certain features shown in Figure 17.

Fig, 19 is a perspective view of the apparatus showing the relative position of the various parts. However, the shutter is not shown in this figure.

Fig. 20 is a perspective of the parts used in transferring a unit to the next higher denominational units.

Fig. 21 shows schematically the arrangement of the strip fields, perforations and contacts.

Fig. 22 shows the position of the discs Bbl to Bbll of Fig. 15, for the position 3 of the shaft BIO.

Fig. 23 is a timing chart for the repeater.

Fig. 24 is a fragmentary detail of the circuits shown at the bottom right hand corner of Figure The term mechanical unit is employed to designate any of the units A, B, C, or D, (Figs. 3, 4, and 15) together forming an accumulator in which A, B, and C respectively constitute the units, tens, and hundreds orders, while D mere'ly indicates the sign of the reading of the accumulator. In other words, each unit A, B, and C comprises a group of four electromagnets Aa1Aax, Ba1-Ba4, etc., of Fig. 18b, the cam-actuated switches Ab1-Abn, Bb1Bb1a, etc., and the relays Ac, Bo, Cc, and Dc, together with the reading and driving mechanism appertaining thereto.

Entering operations Each of the four contacts of the perforated line (Fig. 1) (one of the lines in each field) in the contact or reading apparatus as covered by my U. S. Patent No. 1,863,097 connects the positive pole of a source of current 800 (Fig. 18a), over the handoperated contact 829 which is always closed when the apparatus is used as an accumulator, with the terminals A or B (Fig. 15) and so on, and with the electromagnets a a forming part of the corresponding denominational unit (Aa -Aa:*. Bal -Ba, etc.) all the said electromagnets being connected by a common lead to the terminal 4|l| and to the negative pole of the source of current supply 800. The perforation of one or more points in a so-called hole line in a field effects the energization of the electromagnets corresponding thereto in the accumulator (Fig. 2). Their armatures 33 (Figs. 2 and 19) are attracted, and raise the corresponding toothed latch bars 29 by means of the rods 32 and the bell-crank levers 3 I. Each locking rod 25 is shown as carrying four pins corresponding to, and arranged to the right of the four toothed latch bars 29. These pins are placed either near the lower edge of the respective rod 25, and are then marked 21, or near the upper edge of the rod, in which they are marked 28. The pins are so arranged that they permit the displacement to the left of only one looking rod 25 for each case when either none, one, or any predetermined combination of latch bars 29 are raised. A raised toothed latch bar 29 releases the lower pins 21 of the locking rods 25, while the upper pins 28 thereof rest on a tooth of the raised toothed latch bar 29. Immediately after the energization of the electromagnets (l -a of the particular unit, represented schematically in Fig. 18b, and mechanically in Fig. 2, the toothed cross rod 34 is lowered, as will be explained hereinafter, whereby its teeth apertures release the pins 26 of the locking rods 25. Because of the arrangement of the pins 21 and 28, one of the eleven locking rods 25 (in the drawing rod 25-4) is released and is then forced to the left by the helical spring 30, dependent upon a selected one or more latch bars 29 being raised; that is, in accordance with the perforated indications in the reading apparatus.

At this moment the cam 44 (Fig. 2) of the continuously rotating driving shaft |3 of the apparatus raises the arm l5 of the bell-crank lever |5--| 6 and by means of the fork at the end thereof, raises the pin IS, the round rod l8, and the cross bar 20 attached thereto and extending over the whole front of the accumulator. The cam 44, the lever l5, and the rod l8 are duplicated at the other end of both the accumulator (Figs. 3 and 4) and of the cross bar 20. This cross bar 20 prevents movement of the toothed rod 2|, despite the pressure of the lever 36, by means of contact with the projection 22 on the rod 2|. The toothed rod 2| follows the movement of the cross bar 20, but only until the projection 24 engages that looking rod 25 which is projected. In Figs. 2 and 19 the bar 2| is raised by lever 36 through the distance corresponding to four units; its teeth thus effect a four-tenths rotation of the toothed wheel 23, (Fig. 2 and Fig. 19) as well as of the arm 60 fastened thereto (Fig. 13 and Fig. 19) which arm rotates freely on the shaft B||l (Fig. 3). On the occurrence of this rotation, the spring-action pawl 6| (Figs. 13 and 19) of the arm 60 carries with it the toothed wheel 62 fastened on the shaft Bill and thus also carries the said shaft, the number drum (Figs. 3, 4, and 19) and the other wheels keyed thereon. In this manner the number drum is moved forward four units, corresponding to the perforated indication in the paper strip under the reading apparatus. The part of the aparatus described above, particularly the electromagnets Bal to 180.4 (Fig. 2), the locking rods 25, the latch bars 29 and the pins 2'1 and 28, constitute a decoding device, because the value is received in code by the electromagnets and is there changed into decimal units by the above-mentioned parts, and is thus entered in the number drums on shaft BIO.

During the further rotation of the driving shaft I3, (Fig. 2) the spring 46, the bell-crank lever |6- I5, and the cross bar 20 under the action of the cam 44 are permitted to return to the lower position, the toothed rod 2| and the toothed wheel 23 being brought back into the starting position due to the engagement between the projection 22 and the cross bar 20. The arm 60 (Fig. 13) follows this movement, but the wheel 62 and the shaft BIO are unaffected due to the engagement of the spring 59 (Figs. 9 and 10) in the star wheel 58 (Figs. 3, 4, 9, and 10) on this shaft, and are held in their new position.

In the meantime the cam 45 on the shaft |3 (Fig. 2 and Fig. 19) has raised the lever 4|, and, through its forked end, this lever raises the pin 40 of the rod 39 as well as the cross bar 38 fixed thereto and extending over the whole front of the accumulator. By means of its forked end, engaging with the cross bar 38, the lever 35, as well as the toothed cross rod 34, is raised, and the inclined edges of the teeth of the rod 34 then force back the pins 26 of the released bar 25, as well as the bar itself. The points of the teeth of the cross rod 34 rest opposite the pins 26 and prevent a forward movement of the locking rods 25 until the next registering movement, that is, until the cam 45 allows the spring 43 to again draw down the lever 4|, together with the rod 39, the cross bar 38, the lever 35, and the toothed cross rod 34.

Tens carry operations If on setting up a value in any denominational unit, for instance, the tens mechanical unit B, the shaft BIO (Fig. 2) is rotated until it reaches its position corresponding to the zero of the number drum, then by means of the tooth 64 (Figs. 14 and 20) of the cam 63 mounted on the shaft BIO (Figs. 1, 14 and 20), the lever 65 (Figs. 5, 14, and 20) on the shaft CH of the next higher unit is rotated forward in clockwise direction. In this rotation of the shaft Cl I the end of the lever 69 (Figs. 7 and 20) which forms part of the transfer mechanism, bears on the rod 55 (also in Fig. 3), while the pin 72 of the spring II rests in the top indentation of the arm 10 and holds the shaft CH in the new position. The cam 41 on the driving shaft l3 (Fig. 7) now raises the arm 48 of the bell-crank lever 4850 and, through the forked end, thereof raises the pin 54, the rod 53, and the cross bar 52 which is fastened thereto and which extends over the whole of the front of the accumulator of Fig. 3. In consequence of the engagement of the bar 52 in the catch 56 of the rod 55, the

latter is carried upward. This rod 55, of each denominational unit, carries a tooth 9 (shown in Fig. 7 as Ag) disposed in each mechanical unit along its length, which tooth occupies the highest position in the tens order, the next highest in the hundreds order, and in the following orders always one position lower. On raising the rod 55, the levers 69 (upon rotation to the right) of those mechanical units to which the tens of the previous mechanical unit are to be transferred, are again forced back to the left by the tooth g. This action does not take place simultaneously, but occurs successively, beginning with the second lowest denominational unit. There is no bar 55 in the units order because it cannot receive any transfer from the right, this being the lowest mechanical or denominational unit. By the rotation of the shaft C11, B11, or D11 (Figs. 2, 5, 6, 7 and 20) which is thus brought about the arm 61 (Figs. 2 and 11) fastened thereon and its spring-actuated pawl 68 (referring to shaft B1 I carry with them the toothed wheel 66 mounted on the shaft C10, so that this shaft is rotated through an angle corresponding to one unit, and its number drum is moved forward accordingly.

When in this manner all the necessary transmissions of a unit to the next following mechanical unit or order, or what is known as tens carry operation, have taken place, the cam 41 is in such position that the spring (Fig. '7) can pull down the lever 48, together with the rod 50, the cross bar 52, and the rod 55, into the initial position.

Registration of negative values The registration of negative values in the accumulator (Fig. 182)) is achieved by the addition of their complements. This substitution of the complement for negative values is accomplished by introducing the inverter (Fig. 16) between the reader or sensing mechanism and the accumulator as illustrated by Figs. 18a and 18b. The reader K (Fig. 18a) which corresponds to the reader disclosed in my copending application Serial No. 756,169 filed December 24, 1923, matured as Patent #1,863,097 of June 14, 1932 is connected at all its sensing contacts 80 to the positive pole of the source of current 800 (Fig. 18a) through the contact of cam 808, positioned on the main shaft 13 of the apparatus, which cam closes contacts 809, 810 once in each revolution or phase. The fourth sensing rod 81d of the first perforation line, designated as an, corresponds to a perforation i (also shown on Fig. 21) indicating negative values, and is connected to the inverter terminal 311. The next three sets $2, .123, and m4 of four sensing rods 80 are connected by four-wire cables 811, 312 and 813, respectively, to the inverter terminals C12, B12 and A12 respectively. The inverter terminal 313 is shown connected to the negative pole of the source of current 800. The inverter terminal 314 is shown as connected to the positive pole of battery 800 by the contacts 814, 815, actuated by cam 801, and the terminal 312 is connected to the positive pole by the contacts 816, 811 of cam 802. The inverter terminals A13, B13, C13 and D13 are connected to the terminals A1, B1, C1 and D1 of the accumulator (Fig. 18b) by four-wire cables respectively. A hand-operated switch 828 (Fig. 18a) permits an impulse to be sent from the positive pole of battery 800 to terminal '11 of the accumulator (Fig. 18b). The terminal 401 is shown as directly connected to the negative pole of 800. The other circuits, respectively involving leads 511, 405, 514, 406 and 516, are connected between the source of current 800, over contacts actuated by cams 803801 (shown in Fig. 18a) positioned on the main shaft 13 of the apparatus, to the terminals of the accumulator (Fig. 18b). These circuits are: From the positive pole of 800 over the contacts 818 and 819 of cam 803, to lead 511; over contacts 820, 821 of cam 804, to lead 405; over contacts 822, 823 of cam 805, to lead 514; over contacts 826, 821, of cam 801, to lead 516; and from the negative pole of source 800 over contacts 824, 825 of cam 806 to lead 406. This inverter can transfer to the accumulator either positive values or the complements of negative values. The working current entering terminal 312 passes over rest contact 315 of relay 300 (Fig. 16) in the case of positive indications, and passes over the working contact 316 in the case of negative indications. As relay 300 becomes energized through the closing of the circuit, current passes from the positive pole of the source of current, through the perforation i (schematically shown with reader contact in Fig. 21) in the reading apparatus, terminal 311 (Fig. 16), the relay 300, terminal 313, to the negative pole. Four wires lead to terminals D13 of the inverter (Fig. 16), but only the three wires to the right enter into action. It therefore is necessary only to connect these three wires to the three wires of terminal D1 of the accumulator (Fig. 18b). The inverter (Figs. 16 and 18a) does not require terminals D12 because unit D in the accumulator (Fig. 181)) will be required only to receive the value 9, which permits the arrangement of the circuits in such manner as not to require the energization of the relays corresponding to Afl to A14 in unit A. In the case of positive figures, the working current arriving at 312 passes over 315 and directly to unit C, thus leaving unit D at zero. In the case of negative figures the working circuit, arriving at 312, passes over contact 316 and, due to the arrangement of the circuits, always over the second, third and fourth wires of terminal D13, counting from the left. The relays Af1 to Af4, Bfl to Bf4 and Cf1 to CM (Fig. 16) are now energized by the reader circuits :04, x3 and :02 (Fig. 18a) in place of the electromagnet Aal to Aa4, Bal to Ba4, etc. Cam 801 (Fig. 18a) on the general shaft 13 (Fig. 19) of the apparatus, closes a circuit from the positive pole of the source of current over terminal 314 (Fig. 18a), the relay 300 and over terminal 313 to the negative pole, thus keeping the relay 300 energized, for the interval indicated in the second horizontal line of the timing chart comprising Fig. 23.

A cam 802 (Fig. 18a) then causes an impulse to be sent over terminal 312 (Fig. 18a), and in case of negative indications over contact 316 of relay 300. This impulse, passing over contact 316, reaches either none, one, or a plurality of the four circuits leading to terminals A13, B13, etc., (as explained subsequently), according to the position of the armature contacts of the relays Afl to Af4, and Bf1 to Bf4 of the several denominational orders, dependent upon the contacts closed by the reader. This impulse reaches the electromagnets Aa1 to Aa4, Ba1 to Ba4, etc. of the accumulator (Fig. 18b) over the terminals A13, B13, etc. (Fig. 18a) and A1, B1 etc. (Fig. 18b). The circuit from contact 318 (Fig. 16) is branched in such manner that the relays Afl to A,f4, Bf1 to -Bf4 and Gil to Cf4 effect the transmission of the complement of the negative figure to the terminals A13, B13, etc. In the denominational unit A the complement is given with respect to H), while in the other units it is given with respect to 9, for reasons which are readily apparent. If the negative value of the units order (A) is 3 for example, then the relay Af3 is energized, and the impulse arriving at contact 3(6 reaches the unit A and branches out in the manner recited hereinafter. The impulse through the working or upper contact of armature 343 is stopped at contact 342, the relay Af2 being at rest. Another branch leads through the rest or lower contact of the armature 352, and then through the working or upper contact of the armature 353, and is stopped at 35l, the relay Afl being at rest. In the third branch the impulse reaches the Working or upper contact of armature 363, then the rest or lower contact of armature 364, and then passes through the third circuit to terminals A13. The fourth branch leads to the rest contact of armature 384 and connects with the fourth circuit at terminals A13. The accumulator (Fig. 181)) thus receives impulses in clectromagnets Aa3 and Aa4, and therefore will register '7 in the units (decimal order), that is, the complement with respect to 10 of the original negative value 3.

In the same manner, the inverting of negative indications in the tens and hundreds order (units B and C) takes place, with the exception that in the latter instance, the complement is calculated with respect to 9. For example the indications zero, 3, or 9, effect respectively the registering in the accumulator of the values 9, 6 or zero. In this way the negative indications are registered in the following manner:

If in the sending apparatus there occurs- Then in the accumulator we find 0 9, 9, 10=0 0 0 (tons are transferred). 7 O 4 2 9 6 The mechanical unit D (Figs. 16 and 18b) is used in case of negative indications only. The Working circuit entering terminal 3|2 now extends over contact 3l6 (relay 300 being energized) through the various branches in unit D over the second, third and fourth wires counting from the left of the terminals D13 to terminals DI of Fig. 181) where it energizes the electromagnets Da2, Da3 and D114 which correspond to the values 2, 3 and 4, and which therefore cause the value 9 to be entered in the D unit of the accumulator in the same manner as previously explained. The switch Dbl is a composite switch for all three electromagnets Da2, Da3, and Dad. This arrangement is made possible by the fact that 9 is the only figure ever entered into unit D and by the further fact, that any registration will always require the action of all three relays. Consequently, the above-mentioned negative indications are registered in the complete accumulator as follows:

9.9.9.10 by transfer to tens=0 0 0 0 9 2 9 6 9 7 8 10 by transfer to tens=9,7,9,0 9 9 3 9 the leftmost value in each line representing the value set up in the auxiliary mechanical unit D. As long as'the addition of the indications gives a negative result, the auxiliary denominational unit D gives a value different from zero, while should positive results be produced, it gives the value zero.

Resetting operatzlons and transfer of values The shaft All) (Figs. 3, l and 19) carries a set of 13 cams, Abl to Abl3, while shafts BIG and CID carry a set of 12 cams each, namely Bbl to Bbll and Bbl3, and Cbl to Cbll and Cb|3, which cams through their projections, can raise levers Adl to Adl3, Bdl to Bdll and B113 and Cd! to Cdll and Cdl3 (Figs. 5, 6 and 12) and which in turn will close, when raised the contacts Af, Bf, C (Fig. 12 and schematically shown but not marked opposite the cams in Fig. 181)) by means of the rods Ae, Be and Ce. The cams Abl to Abd, Bbl to RM and Cbl to CM are so arranged on their shafts that their projections close the contacts Af, Bf and C1 (in the manner described above) corresponding to the com'ple-- ment of the respective shaft, and, therefore, accumulator position. In unit A the complement is figured in regard to while in the other units it is figured in regard to 9. They are used for setting the accumulator to zero and taking part in the transfer of complements to another apparatus, as for instance, an accumulator in the manner described hereafter. The cams A175 to Ab8, Bb5 to EM and CD5 to CM have projections that close the contacts AJ, Bf and CI correspondto the actual positive position of the respective shafts, and are used for the transfer of the actual momentary accumulator reading to another apparatus. The cams AM to Abl2, Bbl and Bb9 to Bbll and Chi and C179 to Cbll close through their projections, the above-mentioned contacts according to the complement to ten to each shaft and accumulator unit position and serve for the transfer of complements to another apparatus as described hereafter. The cams Abl3, E1113 and Cbl3 establish contacts for the energization of relays Ac, Be and Co respectively in any position of the corresponding shafts except in their zero position. a

The cams Abl to Abl3, Bbl to Bbll and Bbl3, etc., illustrated in Fig. 18b are shown in the zero position of the shafts All), Bill and CH). The cams carry single teeth or elongated projections according to the requirements for the closing of contacts. Bb5 (Figs. 18b and 22), for instance, has three teeth which will close a contact in positions, 1, 5 and 8 of the shaft BID because the code number 1 is required for values 1, 5 and 8 (see code in Fig. 1). Bb8 has an elongated projection closing the contact during positions 4 to 9 inclusive because the code number 4 is required in all values from 4 to 9.

Resetting operations The setting of the accumulator to zero will now be explained. The cams AblAb4, Bbl-Bb4, and Cb|--Cb4 (Figs. 3, 4 and either raise or leave at rest, dependent upon the position of their projections (Fig. 12, B171 to Bbd being indicated by El), Bdl to BC, by Ed, Bel to Be4 by Be, and B1! to Bfd by Bf), the corresponding rotatable arms Adi-Add, Bd|Bd4, and Ccl|Cd4 (Figs. 5 and 6), and in the first case raise the respective bolts e (Be, 06, etc., Fig. 12, Ael, Bel, etc. in Fig. 19) thus closing the contacts in the contact I (Bf, Cf, etc). The cams Ab4, B1)! to 3214, Cbl to CD4 are so mounted on the shafts AH], Bill, and CH) (Fig. 15) that they close the circuits energizing the electromagnets Aal to 'Aa4, Bal to Ba4, etc. (Fig. 181)) corresponding to the complement of the accumulator reading of the respective unit. This complement is again with respect to II) for the unit order A, and with respect to 9 for mechanical units B and C. The connections are diagrammatically represented in Fig. 18b.

The terminal H (Fig. 18b) is connected through hand-operated switch 828 (Fig. 18a) to the positive pole of the source of current 800 (Fig. 18a) and if this contact be closed, then the impulse passes from terminal H to the contacts of cams AblAb4, Bbl-Bb4, Cbl-Cb4, andDbl, and according to whether these contacts are in open or closed position, are stopped or extended to the corresponding electromagnets Aal to Aa4, Bal to Ba4, etc. The energized electromagnets cause the complement of the accumulator reading to be entered in each unit and thereby return the accumulator to zero.

If for instance, the indication of the tens order B is the value 3, then the cams EM and BM (Fig. 22) are in such position that they close their contacts (representing the complement of 3 with respect to 9, or 6), while the contacts of cams Bbl and B123 remain open. The circuit from the positive pole over terminal H extends over contacts of cams EM and EM and energizes the electromagnets Ba2 and B114, which in 'turn raise their corresponding latch bars 29 (Fig. 2) and release the locking rod 25-45. The raising of the toothed rod 2| by six teeth turns the accumulator drum of the mechanical unit B by six units, bringing it to the position 9 (the value 3 having previously been set up therein). The entering of the complements to the original entry in the accumulator brings the units order to zero and all the others to the position 9. The setting of the units order A to zero will cause the transfer of a unit to the tens order B, as explained previously for positive figures. The tens order, being in the 9 position, will be carried forward to zero, and the transfer of a unit to the hundreds order C will be efiected. The hundreds order being returned to zero, a unit will be transferred to the auxiliary unit D. If D were originally at zero, then the number 9 has been entered during the process of setting the accumulator to zero, and a unit is now transferred from the hundreds order, to advance it to zero. If D were originally at 9, then it did not receive a complementary figure, and remained at 9 until a unit is carried forward from the hundreds order, thus effecting its advance to zero.

Transfer of values It may become desirable to transfer the indications of the accumulator to another apparatus, for instance another accumulator. This second accumulator may be of various types. For the sake of simplicity, however, we shall assume the construction of the second accumulator to be identical with the accumulator described in these pages. The terminals A2, B2, C2 and D2 (Fig. 18b) of the first accumulator are then connected to the terminals Al, Bl, Cl and DI of the second accumulator. The transmission can take place in any position of the accumulator elements A, B, C through the switch cams Ab5-Ab8, Bb5-Bb8 and Cb5Cb8 (Fig. 18b) These cams raise or leave at rest, according to the position of their projections, the corresponding rotating arms Ad5Ad8, Bd5-Bd8 and Cd5--Cd8 (Figs. 5, 6, and 12 the latter showing the rotating arms Bd5Bd8 as Ed), thereby raising the respective bolts e (Be in Fig. 12), thus closing the contacts in the cam-actuated switches f (Bf in Fig. 12) in the same manner as previously explained. The corresponding working circuit leads from the negative pole of the source of current 800 through a cam 806 (Fig. 18a.) to the terminal 406 and the contact 6 of the relay Dc (Figs. 18a and 18b). It then passes over the trunk line 4!! and branches into three circuits H8, H9 and 420 to the contacts of the above-mentioned cams A115 to Ab8, Bb5 to B128, and CD5 to CD8, and from there, over those contacts that are closed by the cams, thus transmitting code values, to the terminals A2, B2, and C2. These terminals are connected to the terminals Al, BI, and Ci of a receiving accumulator (Fig. 18b) (to be described hereinafter), and the current, passing over any wire going to these terminals, will reach the corresponding electromagnet Aal to A114, Ball to 13114, Cal to CM, thereby registering the corresponding value in the receiving accumulator in the same manner as described for this accumulator. If, for instance, the mechanical unit 13, through the position of its axis BIO, registers the positive value 5, then the projections of the cams B225 and BM corresponding to the values 1 and 4 (=5) will cause their contacts to be closed, thereby transmitting current through terminals B2 and extending over the terminals BI (Fig. 15) of a receiving apparatus identical with the accumulator under discussion to the corresponding relays Ba! and 3:14 of said receiving apparatus as described subsequently.

As previously stated,-the negative character of the accumulator reading is evidenced by the shaft DID taking up the position corresponding to the digit 9. This position is attained in the same manner as are the other negative indications and as described previously. The short impulse received, in case of negative indications. through terminal 3l2 over working contact 3l6 of the relay 300 (Fig. 16) invariably passes through the three leads 2, 3 and 4 of terminals Dl3 in case of negative indications, and extends to the electromagnets Da2, Da3, and Da4 (Figs. 15 and 18b) thus causing the locking rod 25- 3 (Fig. 2) to advance and effect the registration of digit 9 in the auxiliary unit D. If the figure previously registered in the accumulator were positive and if the result of the subtraction of the said negative figure, accomplished by the addition of its complement, still leaves a positive figure, then the addition of the complement will result in the transfer of a unit from C to mechanical unit D and the latter is returned to zero in the manner described for transferring of tens to the next mechanical unit. If the figure registered in the accumulator after the addition of the complement of the negative figure is negative, then the shaft DID remains in the position 9. The complement registered in the accumulator can be directly transmitted to another apparatus in the same manner as indicated for the transmission of positive figures, the transmission taking place through cams ADS-A198, Bb5Bb8, and Cb5-Cb8. In most cases the practice, however, is to transmit the absolute (negative) value with due regard to the negative sign and not the complementary figure. For this purpose, in the first place, the relay Dc is employed, the said relay receiving current from the positive pole of the source of current supply, through contacts BIB, 8 IQ of cam 803, the cam closing a circuit through lead 511 (Fig. 18a) to the terminal 5H (Fig. 18b) 404, contact 424 of the cam Dbl3 which is closed whenever the thousands order wheel is not in zero position, through relay Dc to terminal 401 which is connected to the negative pole. The negative character of the accumulator reading can be transmitted to another apparatus by an impulse over lead 406 and working contact 413, relay Dc being energized, over terminal 40! to a receiving apparatus. The working circuit coming from the negative pole over the contact of cam 806 (Fig. 18a) to terminal 406 (Fig. 18b) passes, now that relay D is energized, over the upper contact of 412 and to the contacts of the cams Ab9 to Ab12 and extends in case of closed contacts over the corresponding circuits of the four wire lead to the outgoing terminals A2. The mechanical operation is performed in the same manner as for cams Ab1 to AbB which raise the rods Ac (the same as Be in Fig. 12) and close the contacts A, (the same as B) in Fig. 12), the latter being diagrammatically shown opposite the cams A129 to Ab12. Whenever one of the shafts A10, B and C10 is not in zero position and the corresponding contact closed by cam Ab13, B1213 or Cb13, the respective relay Ac, B0, or Cc, is energized by the circuit leading from the positive pole of the source of current 800 over contacts 818, 819 of cam 803, lead 511, the corresponding lead to the contact Ab13, Bb 13, or CD13, through its corresponding relay Ac, Be, or Cc, over lead 401 to the negative pole of the source of current. The energization of the relay is maintained by the secondary circuit coming from the positive pole of the current over contacts 820, 821 of cam 804, lead 405, contact 431, 441 or 451, through the relay, and over lead 401 to the negative pole of the source of current. The cams A129 to Ab12 are so positioned on the shaft A10 that they close the contacts representing the complement with respect to 10 of the momentary indication of the mechanical unit and the position of its shaft 10 which in the case of negative values is the complement of the complement registered in the accumulator, or the absolute negative value. If the indication of the mechanical unit A is for instance '7 and its negative character is expressed by the position 9 of the mechanical unit element D (the real value of A is minus 3) then the contact of cam Abll (Ab9, Ablll, Abll and Ab12 closing contacts according to code values 1, 2, 3 and 4 respectively) is closed and the value 3 is transmitted over the third circuit to the outgoing terminals A2,

The complementary values of negative indications of mechanical units B and C must be transmitted as calculated either with respect to 10 or to 9, according to whether the previous units indicate zero or another figure. This distinction is required because the complement of a value is obtained by deducting the first digit to the right other than zero from 10 and all the succeeding digits to the left thereof from 9. When the real value is 230 for instance, the complement is 9770, and when the real value is 600, the complement is 9400.

The energization of the relays A0, B0 and Co (Fig, 1%) depends upon the closing of the respective contacts by the cams Ab13, Bb13 and CD13 (Fig. 18b) In the zero position of the shaft A10, B10 and C10 these contacts are broken, but in all other positions, they are closed, thereby making the energization of the relays Ac, Be and Cc possible. These relays determine the direction of the working current as subsequently explained. If complementary values of negative figures are registered in the accumulator, the thousands order wheel therefore indicating a value different from zero and the relay Dc being energized, then the following operation can take place (Fig. 15) If the shaft A10 is in its zero position, that is, if the indicator drum (as shown in Figs. 3, 4 and 8), reads zero, then the relay Ac is not energized. A working circuit leads from the negative pole of the source of current through the contacts 824, 825 of cam 806 (Fig. 18a) leading to lead 406 (Figs. 18a and 18b) to the terminal 406 (Fig. 18b) and then working contact 412, thereby reaching the contact 432, and extends over its rest contact, since relay Ac is not energized, to the contacts of cams Bbl, Bb9, E1710, and B12 and extends over the wires of the closed contacts to the exit terminals B2 and to a receiving apparatus. If, however, the shaft A10 is not in the zero position, then the relay Ac is energized and the rest contact of 432 is replaced by its working contact. The circuit arriving from the negative pole of the source of current through the contacts 824, 825 of cam 806 (Fig. 180.) over lead 4015 (Figs. 18a and 18b), working contact 412, to the contact 432, now extends over its working contact to the contacts of cams Bbl, Bb2, EM, and EM and extends over the wires of the closed contacts to the exit terminals B2 and to a receiving apparatus. The cams Bbl, B179, E1210 and Bbl 1 are so positioned on the shaft B10 that the contacts which are closed by the cam projections correspond to the complement with respect to 10 of the indicated value. The cams Bbl, B122, B173, and BM are the same as used for setting the counter back to zero and they now close a parallel set of contacts according to the complement with respect to 9. The details of the operation through these cams is exactly the same as for the setting to zero and the transmission of positive values, and needs no further explanation. If both of the mechanical units A and B (units and tens) are in zero position, then the circuit coming from the negative pole of the power source 800 in the same manner as described above over lead 406 over the rest armatures of contacts 432 and 442 (relays Ac and Ba being without current) passes to the contacts of the cams Cbl, C119, 01210 and CD11, causing the complement of the accumulator position in C with regard to 10 to be transferred through terminals C2. If the units (A) are not zero, then the working circuit passes over the working contact 412 and contact 433 to the contacts of cams C221, C222, Cb3 and CD4 representing the complement with respect to 9 which applies whenever one of the previous digits to the right is different from zero. If the units (A) are zero but the tens (B) are not zero, then the working circuit from 406 passes over working contact 412, rest contact 432, working contact 442 to the same cams Cb1, Cb2, Cb3 and Cb4 which through their positions (complements to 9) close certain contacts and cause the complement to the accumulator position in mechanical unit C to be transferred through terminals C2. In both of the mechanical units, B and C the arrangement of the cams is the same, and consequently the result is the same.

Accumulator readings At the bottom of Fig. 15, which shows only that portion of Fig. 18b which is necessary for the operation of the apparatus as an accumulator, there also is illustrated the shutter (cover plate) 421, through the openings of which the accumulator drum indications are read. The position of the readings of the two number drums of the units order A are indicated by A3 and A4; of the three number drums of the tens order B by B3, B4 and B5; and of the three drums of the hundreds order C by C3, C4, and C5. The readings A3, B3, and C3 correspond to the positive values of the positions of the accumulator shafts; the readings A4, B4, and C4 correspond to the complementary values with respect to ten; and the readings B5 and C5 correspond to the complementary values with respect to nine of the positions of the accumulator shafts. The shutter 42! in Fig, 15 is shown in its rest position and exposes the positive accumulator drum readings A3, B3 and C3 through the respective windows A6, B8 and C0, all the other drum readings being covered by the shutter. The positioning of the shutter 42! for negative values is performed as follows:

The energized relay Dc (negative values) attracts its armature 4l4 (Fig. 15) so that the shutter 42! is moved by the lever 4 !0 to the right. The indications of the positive wheels or drums (extreme right drum in Figs. 3 and 4) A3, B3 and C3 (Fig. 15), are covered as a result of the shifting of the windows A6, B6 and C6, while the windows A7, B1, B8, C! and C8 are moved into position to permit the observation of the wheels or drums having negative indications, (complements of positions of the shafts AID, EM and C10). The shutter windows A1, B! and C! expose the drum readings A4, B4 and C4 respectively while the shutter windows B8 and C8 expose the drum readings B5 and C5 respectively. The accumulator drum indications A4, B4 and C4 corresponding to the complements of the shaft position with respect to 10, and the accumulator drum indications B5 and C5 correspond to the complements of the shaft position with respect to 9. The necessity of these two readings has been explained previously. Should the mechanical unit A be in its zero position, then the relay Ac is without current and its armature 434, the lever 435, and the lever B9 with attached swinging cover disc remain in the position shown in Fig. 15 over the negative accumulator drum indication B5 for the complement with respect tonine, and leaving visible through the window B! the accumulator drum indication B4, which is the complement with respect to ten. If the mechanical unit A is not in the zero position, then the relay Ac is energized, the armature 434 is attracted together with the lever B9 with attached swinging cover disc which now will cover the negative drum reading with respect to ten B4 and uncover the negative drum reading with respect to nine B5 through the window B8. The same reasoning applies to mechanical unit C.

Repeater By means of a single multiple switch of conventional type the electrical connections of the accumulator (Fig. 15) may be replaced by those of the repeater (Fig. 17). Such a multiple switch is shown at 400 in Fig. 18b where it is positioned to the right and establishes the connection for the accumulator. When it is thrown to the left, the multiple switch 400 establishes connections and disconnects others, as shown by the broken lines, adapting the apparatus for use as a repeater. In this position the following changes take place: The positive pole is connected through contact 822, 823 (Fig. 18a) of cam 805, over lead 5I4 to the contacts 546, 538 and 526 (Fig. 18b) of relays Cc, Be, and Ac respectively. It disconnects leads 406 and 405. The lead 5!'!,

with current arriving from the positive pole, contact 8!8, 8!!! (Fig. 18a) of cam 803, is now connected to lead 5!5 (Fig. 18b). The connections for the lead 1!, for the entire unit D, for the contacts of cams Ab! to Abl2, Bb! to B1), Cb! to Cb! for the electromagnets Aa! to Aa4, Ba! to RM, Ca! to C04, are all cut or broken, and new connections are established for the electromagnets Aal, Ba!, and Cal.

In order that the apparatus can function as a repeater, the apparatus is connected through an inverter of the type shown in Fig. 16 but adapted to produce complements with respect to ten in all the units A, B, and C, the connections then continuing to a reading apparatus, such for example as that shown in my U. S. Patent No. 1,863,097, as may be seen from Figs. 18a and 18b. The connections which are established between the reading apparatus and the inverter consist of a lead 8!d (Fig. 18a) from the fourth contact of line X! of the reading apparatus, over 3!! to relay 300 (Fig. 16) of the inverter, four leads each from the four contacts of lines X2, X3, and X4, respectively, to the four-wire terminals C!2,

BIZ, and A|2 of the inverter. The inverter termi- 1'.

explained in connection with Figs. 18a and 18b, 1

the succession of operations being shown in the timing chart of Fig, 23. The cams 80!, 802, 803, 804, 805, 806, 801, and 808 are mounted on the main shaft of the apparatus and make one complete revolution in each cycle. In the beginning of the first cycle the relay 500 is energized by the circuit from the positive pole, contact 826, 82'! of cam 801, lead 5H3, contacts 525, 535 and 545 of relays A0, B0 and Cc which are at rest, relay 500, lead and back to the negative pole. This relay can only be energized in the beginning of the first cycle because immediately after and during the succeeding cycles one of the relays Ac,

, Bc or Cc will be energized and break the relay current in the respective contact 525, 535 or 545. Also in the beginning of the first cycle the indications of lines XI, X2, X3 and X4 in the reading apparatus are transmitted to the inverter by the circuit traced from the positive source, lead 5!8, contact 502 which is closed by the relay 500, lead 5|9, contact 809, 8!0 of cam 808, contact plates 80, through any perforations in the record strip, momentarily in the reading apparatus, leads 3! 8! 8 l2 and 8 !3 into the inverter and over terminal 3! 3 to the negative pole. The transmission of indications or values from the reader to the inverter are dependent upon the energization of relay 500 and can, therefore, occur only in the beginning of the first cycle. The entry of indications into the inverter and the transmission to the repeater, which in this respect is the same as the accumulator, was previously explained and will not be repeated here. The relays of the inverter are kept energized by the circuit traced from the positive pole of the source of current, contact 8I4, N5 of cam 80!, terminal 3!4, the respective relays, terminal 3!3, and back tothe negative pole. Immediately succeeding this operation the complements with respect to ten of the indications received in the inverter are transmitted to the respective electromagnets Aal to AIM, Bal to Bad, and Cal to Cat by the circuit traced from the positive pole of the source of current, contacts BIS, 8H of cam 802, terminal 3I2, the various branches under the inverter relays, inverter terminals Al3, Bl3, Cl3 and Dl3 to the repeater terminals Al, Bl, Cl and DI, the electromagnets mentioned above, lead "I, and back to the negative pole. This operation brings the shafts AID, Bill and CH1 and the cams Abl3, Bbl3, and Cbl3 to positions corresponding to the complements with respect to ten of the indications in the reading apparatus. The relays Ac, Bc and Cc can now be energized. Assuming that the reader indications in X2, X3, and X4 are respectively 3, 8 and 6, then 01213 will be in the position I, Bbl3 will be in the position 2, and Abl3 will be in the position 4. The relay Cc is next energized by the circuit from the positive pole of power source 800, contacts M8 and N9 of cam 803, lead H, lead 5I5, contact of cam Cbl3, relay Cc, 4M, to the negative pole (Fig. 18a). The energization of relay Cc breaks the release relay (500) current coming from 5l6 and interrupts the working current over lead 5" at contact 541 so that, during theperiod the relay Cc remains energized, neither relay Bc nor relay Ac can be energized. This energization of relay Cc, and subsequently of Be and Ac, will be repeated in each cycle or revolution of the main shaft of the apparatus and will in each cycle be immediately followed by an impulse from the positive pole of the source of current 800 over the contacts 822, 823 of cam 805 (Fig. 18a) on the main shaft, lead 5, contact 545 which was closed by relay Cc, electromagnet Cal, terminal 40!, to the negative pole. The energization of the electromagnet Cal causes the transmission of a unit into the mechanical unit C as previously described for the accumulator, and advances the cam 01213 from position '7 to position 8.

This action is repeated with the next and the following rotations (or cycles, since each rotation constitutes a cycle) of the driving shaft, the cam Cbl3 is thus finally brought to its zero position, its contact is broken, and the relay Cc is set'at rest. The contact 54'! of this relay Cc is closed and consequently the relay Be is energized by the circuit from the positive pole, contacts M8 and 8I9 of cam 803, 5, 515, 541, contact of cam Bbl3, relay Be, 40 l, negative pole. The relay Bc being energized, the relay Ac cannot receive any current due to the interruption of contact 531. In mechanical unit B the value 2 was previously registered so, that its shaft B10 with the cam Bb|3 are in position 2 and are moved forward with each cycle by one unit; relay Bc remains energized during 8 cycles (10 minus 2), relay Ac enters in action during the next 104=6 cycles, the value 4 having been registered in this mechanical unit. After this last cycle the rest contacts 525, 535 and 545 of the relays Ac, B0 and Co, respectively, are all closed, and the release relay 500 can again be energized.

The showing of Fig. 17 may be likened very much to that of Fig. 15, except that all that equipment of Fig. not necessary for the operation of the device as a repeater has been omitted.

Below the relays Ac, Bc, and Co (Figs. 17 and 18b) and actuated by them, are three corresponding sets of contacts 528 to 530, 538 to 540 and 548 to 550. These contacts are closed each time the respective relay is energized. As explained previously, the relays Ac, Be, and Cc are energized in each cycle as long as the respective cams Abl3, Bbl3 and CH3 are not returned to zero, or during the same number of cycles as impulses to Aal, Bal and Cal, respectively, are required to set the mechanical units back to zero, These contacts can, therefore, be used to transmit repeatedly impulses in predetermined number.

Operations for multiplications The use of these contacts will be explained by an example involving multiplications. The connections between the source of current, the reader, the inverter and the accumulator acting as repeater will remain the same with the following exceptions, which were made to limit the example to two digits. The four-wire cable from the second line :02 of the reader K (Fig. 18a) is discontinued, the four-wire cable from the third line or; (tens order) is connected to terminals A12, of the inverter, and the four-wire cable from the fourth line 0:; (units order) is connected to the inverter terminals Bl2. In this manner the complement of the two digit multiplier appearing in the reading apparatus is registered in the repeater in the manner described previously.

The contacts of the two digit multiplicand of the fifth and sixth lines 325 and we (Fig. 18a) in the reading apparatus are connected by four-wire cables Y2 and Y1 (one wire for each line contact) to the left hand terminals 805 and N5 of the contacts 529, 539, respectively, and left-hand terminals 694 and 514 of contacts 528, 538 (Fig. 181)) respectively, in the manner described subsequently. Each group of contacts 529, 539, 528 and 538 is connected with four insulated wires, one for each lead of the four-wire cables Y1 and Y2. The right-hand terminal Bill of contact 528 is connected to terminal Bl of a second accumulator; terminal 6| I of contacts 538 to terminal AI; terminal 502 of contacts 529 to terminal Cl; and terminal 812 of contacts 539 to terminal Bl of said second accumulator.

Multiplications can now be performed by the process of successive additions. In order to illustrate the procedure the figure 68 (multiplier, third and fourth lines in the reader) will be multiplied by the figure 53 (multiplicand, fifth and sixth lines in the reader), and I will ca w=68 and y=53; then Y w1=number of units of w w2=number of tens of w y1=number of units of y yz=number of tens of y The four-wire cable Y connected with the reading apparatus contacts for the sixth line registering 3111, the units of the multiplicand (Fig. 18a) is then connected with the two accumulator repeater terminals 6 and 504 (Fig. 18b) simultaneously, and the four-wire cable Y for the fifth line registering yz, which is the tens order of the multiplicand, to the terminals M5 and 605. The connections with the second accumulator-repeater (Fig. 18b), which acts as an accumulator, are established as follows:

6H to Al (units) of second accumulator (Fig. 18b).

612 and 60! to Bl cumulator (Fig. 181)).

602 to Cl (hundreds) of the second accumulator (Fig. 18b).

As previously explained, the complement of (tens) of the second ac- 101:8, or 2, is registered in the mechanical unit B and the cam Bbl3 closes its contact, thereby permitting the energization of the relay Be. In each one of the succeeding eight cycles the following procedure will take place. An impulse from the positive pole of the power source 800 passes over the contacts 818 and 8l9 of cam 803, terminal 5" (Fig. 18b) over lead 5l5 (upper left-hand section), passes over 541, 531, contact of cam Bbi3, relay Be, 40!, to the negative pole, and energizes the relay Be and attracts all its contacts. In this manner the working contacts of 538 and 539 are closed, the value 111 is transmitted a single time from the reading apparatus over M4, the contacts 538, 6H to the mechanical unit A of the second accumulator (Fig. 18b), as previously described for registration of values in the accumulator. Likewise the value 11: is transmitted over ("5 (Fig. 18b), 539, 512 to the mechanical unit B. The second accumulator (Fig. 15) now registers the value 53. During the same cycle an impulse will be received from the positive pole of the power source 800 over contacts 822 and 823 of cam 805 (Fig. 180.) to terminal 5 (Fig. 18b), 536 (which is closed by relay Bc), Bal 40!, to the negative pole, which will register a unit in B and will advance the shaft B10 and the cam Bb|3 by one position. The closing of working contacts 538 and 539 and the registration of a unit will be repeated in each cycle until BIO and Bbl3 reach the zero position, and the circuit energizing Be is interrupted in Bbi3. The described procedure will be repeated in this example 8 times (two having been set up), so that the value 53 is transmitted 8 times from the reading apparatus to the second accumulator, which is equivalent to its multiplication by 8.

Mechanical unit A remains inactive during the operation of mechanical unit B, because the energization of relay Bc interrupts the circuit from 515, over 541 in 531, thus preventing the energization of relay Ac. Now, after relay 30 came to rest, the relay Ac will become energized by means of the circuit from the positive pole of the power source 800, contacts M8 and 819 of cam 803, (Fig. 18a) to lead 5l1 (Fig. 182)), 5i5, 541, 531, contact of Abl3, relay Ac, 401, to the negative pole; and the energization of Ad! will take place over the circuit from the said positive pole, contacts 822 and 823 of cam 805 to lead 5 (Fig. 18b) 526 (which is closed by relay Ac), Aal, 40L to the negative pole. The operation taking place in the mechanical unit A is now the same as de scribed previously in connection with unit B. The value 4 having been entered in A, the operation will be performed 6 times. .111 is transmitted 6 times from the reading apparatus over 604, contacts 528 (Fig. 18b) of relay Ac, 601, to mechanical unit B (Fig. 18b) of the second accumulator, and 112 is transmitted 6 times from the reading apparatus over 605, contacts 529, 802, to mechanical unit C (Fig. 181)). The value 53 is in this manner registered 6 times in the second accumulator, and as the unit 3 now registers in the tens order (B) of the second accumulator and the tens 5 in the hundreds order (C), this successive addition is equivalent to a multiplication by 60. This completes the multiplication of 53 by 68.

From the description and the drawings it will be seen that the transmission of values or indications from the acculumator-repeater to a receiving apparatus (in the description assumed to be another accumulator but which may be a different apparatus) do not necessarily depend upon the momentary movement or position of the perforated record in the reader, nor does it have to coincide with such movement or position.

It is of course obvious that once the broad features of my invention are disclosed, numerous modifications and adaptations thereof will readily occur to those skilled in the art. Accordingly, it is contemplated that the invention be limited only by the scope of the appended claims.

What I claim is:

1. As part of statistical apparatus, including receiving apparatus, a plurality of differentially positionable accumulator elements, corresponding to successive denominational orders, a plurality of pairs of contacts for each of the said accumulator elements, a plurality of cams for each of the said accumulator elements movable by the corresponding accumulator element and adapted to close certain of said pairs of contacts, singly or in combination, in accordance with either the value standing on and indicated by the position of the said accumulator element or a selected one of its complements, and transmission circuits connected to said contacts for transmitting the value standing on said accumulator elements to selected receiving apparatus, a relay for each accumulator element controlled by the positioning into and outof zero position of a selected one of said plurality of cams, the transmission circuits of higher orders extending through and controlled by a relay associated with an accumulator element of a lower order to select pairs of contacts of the higher order accumulator element, dependent upon which of said complements is to be transmitted, the selection of a particular relaycontrolled-transmission circuit being dependent upon the energization or de-energization of said relay.

2. As part of statistical apparatus, including receiving apparatus, a differentially positionable accumulator element, a cam movable by said accumulator element, contacts closed by said cam, a second difierentially positionable accumulator element, a plurality of sets of cams movable by said second accumulator element, the first of said accumulator elements indicating by the position of its cam whether the value standing on said second accumulator element is positive or negative and closing said contacts in the latter case, the plurality of sets of cams in said second accumulator element indicating the value standing thereon or its complement, a plurality of pairs of contacts, the sets of cams of said second accumulator element being adapted to close certain of said pairs of contacts in accordance with the position of said second accumulator element, one set of said cams of the second accumulator element being adapted to close certain of said pairs of contacts for transmitting the value standing on said accumulator element, another set of cams of the second accumulator element being adapted to close certain others of said pair of contacts for transmitting the complement of said value, a relay energized under the control of said firstmentioned contacts, .a circuit controlled by the contacts of said relay for directing current to the contacts of one or the other of said sets of cams of said'second accumulator element depending upon whether said relay is energized, and transmission circuits connected to said pairs of contacts of said cams of the second accumulator element, for transmitting an impulse over those pairs of closed contacts to which current is directed, in accordance with the value standing on said second accumulator element, said impulse being transmitted to selected receiviir apparatus. 

